Hole spacing and centering device



Oct'. 7, 1952 H; TIMPNER 2,612,793

HOLE SPACINGAND CENTERING DEVICE Filed Nov. 17, 1950 1 I 2 SH ETS-SHEET1 27 3nvemor' J HENRY 77m I A/E2,

Oct. 7, 1952 H. TIMPNER 2,512,793

HOLE SPACING AND CENTERING DEVICE Filed No 17, 1950 2 SHEETS-SHEET 23nvento HEmev 77M PNEZ WWW/ Patented Oct. 7, 1952 HOLE SPACIN G ANDCENTERING DEVICE Henry Timpner, Milwaukee, Wis., assignor of onehalf toRobert F. Krainz, Milwaukee, Wis.

Application November 17, 1950, Serial No. 196,298

4 Claims. (01. 77-55) This invention relates to improvements in holespacing and centering attachments for drillin machines and moreparticularly to adjustable devices of the type.

An object of the invention is to provide a device of the type includingmeans for hole spacing and centering on shafts or tubes.

Another object of the invention is to provide means for centering adrilling operation in'the end of a shaft or the like.

Another object of the invention is to provide a'device of the typeincluding stop means for holding a spindle of a hole spacing andcentering attachment in a raised position between drilling operations.

Another object of theinvention is to provide a device of the type whichwill space and center holes in a channel or the like.

Other and further objects of the invention will appear as thedescription proceeds, reference being had to the accompanying drawing,in which:

Fig. 1 is a side view partly in elevation and partly in section of oneform of the invention applied to a drilling machine.

Fig. 2 is a plan View taken on line 22 of Fig. 1.

- Fig. 3 is an inverted plan view thereof.

Fi 4 is a vertical sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a view in perspective of a portion of a round rod showingaligned closely proximate drill holes.

- Fig. 6 is a fragmentary view in perspective of a hexagonal rod showingholes spaced on an edge thereof.

Fig. '7 is a fragmentary View of a rod square in cross section showingaligned holes spaced in one space thereof.

Fig. 8 is a fragmentary view in perspective of v a similar rod showingholes spaced along opposite edges thereof.

Fig. 9 is a side view partly in elevation and partly in section of amodified form of the invention.

Fig. 10 is an end View partly in section taken on line Ill-l0 of Fig. 9.

Fig. 11 is a vertical sectional view of another modification of theinvention.

Fig. 12- is a view taken on line l2l2 of Fig. 11.

Fig. 13 is a fragmentary view in perspective of an end drilled rod.

Fig. 14 is a similar view of a hexagonal rod.

Fig. 15 is a like view of a square rod.

Fig. 16 is a side View in vertical section of another modified form ofthe invention.

Fig. 17 is a view taken on line l'l-l'l of Fig. l6. Fig. 18 is a planview of said modified form. Fig. 19 is a view taken on line I9I9 of Fig.18. This invention pertains to structures related to those embodied inmy prior patent application bearin the Serial No. 182,443, filed August31, 1950, and comprises an extension In subjoined to the feed gaugethreaded member H, and supporting between the nuts l2 and it thehorizontal bifurcated member M which in turn retains the vertical sieeveI5 provided atits upper end with the centrally apertured plug isthreadingly engaged therewith. A similar apertured plug ii isthreadingly engaged in the lower end of the verticalsieeve IS. A pistonis is held Within the sleeve I5 and is movable vertically through theapertures of said plugs I6 and H. A collar i9 is fixed by means 20 onthe piston l8 to bear against said plug H to limit the downward movementof said piston and to retain a coil spring 2| thereon. The upper end 22of the coil spring 2| bears against the underside of the apertured plugl6. p An annular groove 23 forms an integral cap 24 on the upper end ofthe piston 18 which may be engaged by an angular rod detent 25 extendingupwardly from and held in the bifurcated member M by threaded means 26.The detent'25 is employed to maintain the piston l8 and attachments in araised position'away from the Work. An arm 27 is secured on the lowerend of the piston I8 by means 28 and is provided with a circularaperture at 29 to accommodate a bushing 30 Whichis axially verticallybored at 3| to permit passage therethrough of a twist drill v32. A

V block 33 is circularly bored in its top at 34 to receive the lower endof the bushing 3lion which it is held by the set screw 35. They block 33has a pair of horizontally extending asts and 3'1 which carry slideablythereon an ad- Justable block 38, provided with an upwardly yieldablemember 39 backed by a coil springllfl retained by a bracket 4! attachedto the block 38 by threaded means 42. The upwardly yieldable member 39carries a spacer finger 43 which forms a right angle with said member 39so that it may be adjusted to aposition immediately adjacent the bore3|. The spacing finger 4371s held in the member 39 by the set screw 44.The spacer block 38 is provided with the set screws 45 and 46 for fixingthe spacer block 38 in a selected position on. the rods 36 and 37. The

assembly shown in combination with the V block rod as shown in Fig. 5where the holes are shown in immediate proximity, in a hexagonal rod asshown in Fig. 6 where the holes are spaced along one of the edgesthereof, in a square rod as shown in Fig. 7 where the holes are spacedcentrally of one of the faces of said rod, and in Fig. 8 where the holesare shown spaced along the edges of a square rod.

In Fi'g."9 a modified formbfthe invention is shown" in whicha bushing50' andV block are In the form of the invention shown in Fig. 9, thecombined bushing and v block and spacer block assembly may be used tospace holes. In the form of the invention shown in Fig. 11 a rod of anyshape in cross-section, presented endwise to the internal cone block maybe centrally drilled with a maximum of accuracy. I In the form of theinvention shown in Fig. 16, the external cone block permits accuratecenter combined. The bushing 50 is held for rotative drilling andspacing of holes in channel formed adjustment in an arm 52 fixed tovertical member 53. A rod 54 extends horizontally from thebushing 50 andcarries a slideably adjustable spacer block 55 adapted to be fixed'on-th'e'rod-Hby the elements or the like.

It will be understood that the device is capable of many" modificationsin structure and design. without departingfrom the spirit 01' theinventhreaded means 56 and having'the s'pa'cer finger t on, within thescope of the appended claims.

51 depending therefrom. 1 This modification will space holes in a roundrod as show'n or in the rods shown in Figs. 5 to 8, inclusive.

In the form of the invention shown in Fig. 11, a-n' 'ape'rtured -aaxially to admit'atwist drill. A cone block 62 '}engages thelower end ofthe bushing 6| within "its 'top end at'63 and is releaseably securedthereto -by the set screw 64. Thecone slot 62 will center I Having thusdescribed the invention, what is "claimed" and desired to be secured byLetters Patent'of the United States, is:

1. In combination with a bushing, a block "rmtll-supports a-bushing 6|bored c n r l 1y releasably attached thereunder, centeringmeans embodiedin the work-facing lower surfaces of said block, lateralguide meansfixed to said blockfa spacer block thereon, a spacer finger yieldablyfixed tosaid spacer block-adapted 1 bored in theend of a d 65 when thelatto successively engage holes to be drilled. and

ter-is 'held within the internal cone at 66 of said block' 62. The saidblock 62 will center a hole -bored'in around rod as-shown in Fig. 13, ahexagon rod as shown in Fig. 14 and a rod square *incross sectionas'shown in Fig. 15.

*-In Fig. lfianother modifiedzform of the invention is shown in which anarm Ilis apertured at II to accommodate a bushing 12 which has securedto its lower portion 13 a block I4 having means for releasably fixingsaidspacer block on saidguide means. x V

2. In combination with a bushing bored to accommodate a twist drill,"ablock centrally releasably attached v thereunder, inverted V faces onthe lower side of said block to centeran article of work engagedthereby, parallel guide means fixed to sa1d block, a spacer blockmovable on said guide means, a yieldable spacerfinger-on said anexterior cone at 15 thereof. v The bushing 12 spacer block, and means fr. releasablyifixmg "and-the block 14 areaxiallybored to permit pas-'=sage therethrough of a conventional twist drill 18. The block 14 maybe releaseably secured to the lower end .13 of the bushing 12 by theset,

said spacer block on saidguide'means.

3. A centering block axially drilled'toaccommodate a twist drill, thelower portion ot said block having an' external iorty fivedegree angledscrew 11. Theblock carries two horizontally cone formationadapted tocenter drill holesj iextendingrods 18 and "which in turn carry aslideably adjustable block 80 which may be secured in'a selectedposition by means of the set 'channel'forms and the like. a 4. Incombination with a bushing bored to accommodate a twist drill, acentering blockcen- =screw 8| and which carries the spring pressspacertrally releasably attached thereunder having arm having thedownwardly directed spacer a yextendirigslotin its under side, paral1e1finger 83. In-use, thearm; 21 may be raisedagainst the pressure ofspring 2] until the cap M i scaught -under the top end of the detent 25.With the -,;assembly thus raised out of a the way, the work can" 7besecuredin place for drilling The block 3 8' can then be positioned'onthe rods 35 and 31, depending on where it is desiredthat the spacerfinger Hbe positionedin' relation to the path of the.v

ftwist drill 32. ;When the desired adjustment is r had, the block 38 canbe secured on said'rods by tightening the threadedmeans iS and 46. :Whenthe first hole is drilled, the spacer "finger and *eimesraa will yieldupwardly'against the'pres- 's'u're'of the spring 40, but after the firsthole'has "HENRY "'PNER.

REFERENCES CITED The following references are of rec file of thispatent: 0rd in the 'UNITED sTA'rEs PATENTs

